Parking brake doesn’t work anymore

A beautiful good day I’ve had a question and I’ve been using the display (checking the parking brake) for 6 months now with the orange key sign Now I’ve had everything renewed from a workshop and the workshop couldn’t read it out ( nevertheless everything worked on the brake ) Now I’ve driven to the workshop ( Renault workshop ) and wanted to read it out You’ve tried it too and it didn’t work there too In contrast it’s worse Now nothing is going on and I don’t know what to do The say control unit broken Can that the workshop has done something wrong and destroyed the control unit for the parking brake ??? After all, everything went before the workshop was on What could it be all about now? Who has to pay for the costs? Ps: Ps: I’ve still checked the parking brake The red parking brake sign blinks permanently when driving and when the ignition is on lights up the red stop sign What can I do?